.22 LR AR-15 CONVERSION KIT
.22 LR CONVERSION KIT FOR THE AR-15 PLATFORM. Just swap this drop in conversion with the bolt carrier group from your 5.56/.223 chambered rifle and you will be ready to shoot .22LR. Ships without a magazine. If you are purchasing this for use with the Echo Trigger, you will also need to purchase the Auto Sear Trip Kit. The Sear Trip Kit is required in order to engage the Trigger Lock and allow the trigger to be pulled. Don't forget to order a few .22 magazines! The .22 LR Conversion Kit that is purchased from FosTecH will include an Extra Power Recoil Spring for customer installation.